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Round|Lab Grown|IGI

1.09ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG818671756

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818671756

Diamond specifications and retailer prices

From $270 USD
As of October 30, 2026
Save $1,080 USD (80%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $1,350 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.09ct lab-grown round diamond

This 1.09ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818671756 or 818671756. Listed at 21 retailers as of October 30, 2026, with prices from $270 to $1,350, a $1,080 spread on the same certified stone. Brilliant Earth lists it at $1,350. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.09
Carat
E
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818671756
Dimensions6.62 × 6.59 × 4.08 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.62 mm6.59 mm1.09 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818671756
Side View
Table 56.0%Crown 34.7°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,350 USD|Low: $206 USD|High: $1,530 USD|Avg: $758 USD|-11.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 12$270 USD
Retailer 7$422 USD
Retailer 6$500 USD
Retailer 5$500 USD
Retailer 10$515 USD
Retailer 11$549 USD
Retailer 2$567 USD
Retailer 13$656 USD
Retailer 8$968 USD
Retailer 4$1,016 USD
Retailer 3$1,204 USD
Retailer 9$1,327 USD
Brilliant Earth$1,350 USD

36 data points across 13 retailers

21 retailers$270 USD to $1,350 USD

Retailer 1
-
$255 USD
Price last confirmed 20 days ago
Retailer 2
-
$259 USD
View
Price last confirmed 38 days ago
A
Retailer 3
-
$270 USD
View
Final sale: no returns
Retailer 4
-
$300 USD
View
Price last confirmed 38 days ago
Retailer 5
-
$316 USD
View
Price last confirmed 18 days ago
Retailer 6
-
$316 USD
View
Price last confirmed 28 days ago
Retailer 7
-
$317 USD
View
Price last confirmed 35 days ago
A
Retailer 8
-
$422 USD
View
A
Retailer 9
-
$500 USD
€476 EUR
View
A
Retailer 10
-
$500 USD
View
A
Retailer 11
-
$515 USD
ZAR 8,324 ZAR
View
A
Retailer 12
-
$549 USD
View
A
Retailer 13
-
$567 USD
£447 GBP
View
B+
Retailer 14
-
$656 USD
View
B+
Retailer 15
-
$968 USD
View
B
Retailer 16
-
$1,016 USD
View
Retailer 17
-
$1,017 USD
View
Price last confirmed 30 days ago
Retailer 18
-
$1,032 USD
View
Price last confirmed 33 days ago
B+
Retailer 19
-
$1,204 USD
£948 GBP
View
B
Retailer 20
-
$1,327 USD
View
Most Expensive
B
Brilliant Earth
21242396A · Oct 30
$1,350 USD
View
20 more retailers have this diamond
Prices start from $270 USDSave up to $1,080 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.09ct Round
$270 USD